Not sure about the "E & E Workwear, the company that has used the building for their business since the late 1950s" I was a Girl Guide in the 1960s and we were invited to a Boy Scouts "do" held upstairs at the Albert School in the mid '60s. It wasn't a factory then.
I've asked MLHS if they can verify the date/decade that the Albert Schools was sold to E&E Overalls.
In the meantime, another theory put forward by Edmund Wilkinson is developing that the plaques may have originally hung in the Union Rooms Mission Church (now the cinema) and were removed to the cupboard in the Albert Schools when the building was converted to the cinema in 1931 (I believe). This theory seems to have some credibility when you look at the details we know about the men listed but not sure that it can ever be proven:
John Brown 44828 enlisted Hyde, 27 years old when killed 29/4/17Lived 104 Hilldrop Terrace, Stockport Rd
Worked at Hollins Mill
Attended Marple Wesleyan Sunday School (is that the Methodist Church now?)
Attended Marple Union Rooms Mission Church
Remembered on Marple Methodist Church plaque
Remembered on All Saints WM
Remembered on Marple WM
Joseph Burrell 24578 enlisted Hyde, 18 years old when killed 25/9/16Lived Hollins Side, Stockport Rd
Worked at Hollins Mill
Attended Marple Unitarian Church and Sunday School (is that another name for what is now the URC?)
Remembered on Marple Reformed Church plaque
Remembered on All Saints WM
Remembered on Marple WM
Harold Cooke 44060 Enlisted Chester, 19 years old when killed 2/9/18Lived 18 Hollins Terrace
Remembered on All Saints WM
Remembered on Marple WM
Marmaduke Cooper, 50238, 35 years old when killed 25/3/18Though to have lived in Marple around 1909 when daughter Olive was born.
Worked as an "assistant superintendent - insurance"
Burt Morris, 50473, enlisted Stockport, 21 years old when killed 7/6/17Lived "Canal Buildings"
Worked at Hollins Mill
Attended Union Rooms Sunday School
Remembered St. Martin's Church plaque
Remembered on All Saints WM
Remembered on Marple WM
Fred Pickford, 76896, enlisted Stockport, 22 years old when killed 25/10/18Lived 46 Market Street
Attended Marple Recreation Club
Attended Marple Union Mission Church and Sunday School
Remembered on Carver Recreation Club Roll of Honour
Remembered on Marple Methodist Church plaque
Remembered on All Saints WM
Remembered on Marple WM
Note: Fred's brother Raymond (age 24 when killed 8/10/18) was a member of Marple Band, attended Albert Day School as a boy and All Saints' Sunday School.
Fred Thelwall, 34742, enlisted Hyde, 23 years old when killed 28/7/16Lived 9 Chapel St
Worked at Hollins Mill
Attended Marple Congregational Church Sunday School
Remembered on Marple Reformed Church plaque
Remembered on All Saints WM
Remembered on Marple WM
Samuel Thelwall, 26454, enlisted Hyde, 20 years old when killed 25/10/17Lived 29 St James Terrace, Hollins Lane
Remembered on Marple Reformed Church plaque
Remembered on All Saints WM
Remembered on Marple WM